Adjectives

(a)ignoblecompletely lacking nobility in character or quality or purpose“something cowardly and ignoble in his attitude”, “I think it a less evil that some criminals should escape than that the government should play an ignoble part” (Oliver Wendell Holmes, Jr.)
(s)ignoble, ungentle, untitlednot of the nobility“of ignoble (or ungentle) birth”, “untitled civilians”